Reply To: Junkers instant gas hot water

Firstly lets go from the end of your question to the front cost to change over if it is an external model would be in the vacinity of $1500 or so as it is a simple task. If however, your unit is an internal one then depending on the flue presently fitted and a couple of other issues this could end up costing upwards of $2500 – depends on too many variables that we have not been able to view.

If your water heater is a thermostatic model then I would suggest that the thermostat file be checked firstly and if it has failed a replacement would overcome your current problem, if it tests to be sound then a full service of both the gas and water valve assemblies would have the same result.